class Pager{
function findStart($limit)
{
if (!isset($_GET['page']) || ($_GET['page']=="1"))
{
$start=0;
$_GET['page']==1;
}
else {
$start=($_GET['page']-1)*$limit;
}
return $start;
}
function findPages($count,$limit){
$pages=(($count % $limit)==0) ? $count/$limit:floor($count/$limit)+1;
return $pages;
}
function pageList($curpage,$pages){
$page_list="";
if(($curpage!=1) && ($curpage)){
$page_list.="Trang đầu";
}
if(($curpage-1)>0)
{
$page_list.="<";
}
/*in danh sach cac trang va lam cho link trang hien tai dam hon va mat gach chan*/
for($i=1; $i<=$pages; $i++){
    if($i==$curpage){
    $page_list.="".$i."";
    }
    else
    {
    $page_list.="".$i."";
    }
    $page_list.=" ";
}
/*in lick cua trang tiep theo*/
if(($curpage+1)<= $pages)
{
$page_list.=">";
}
if (($curpage!=$pages) &&($pages!=0)){
$page_list.="?page=".$pages."\" title="Trang cuối\">Trang cuối";
}
$page_list.="n";
return $page_list;
}
function nextPrev($curpage,$pages){
$next_prev="";
if (($curpage=1)<=0){
$next_prev.="Trở về trang trước";
}
else
{
$next_prev.="Về trang trước";
}
$next_prev.="|";
if(($curpage+1)>$pages){
$next_prev.="Ð?n trang sau";
}
else
{
$next_prev.="Đến trang sau";
}
return  $next_prev;
}
}
?>
//gọi và sử dụng
    include("config.php");
$p=new pager;
$limit=10;
$start=$p->findStart($limit);
$count=mysql_num_rows(mysql_query("select * from sinh_vien"));
$pages=$p->findPages($count,$limit);
$result=mysql_query("select * from sinh_vien limit ".$start.",".$limit);
while($row=mysql_fetch_object($result)){
$ten_sinh_vien=$row->TEN_SINH_VIEN;
echo "$ten_sinh_vien
";
}
$page_list=$p->pageList($_GET['page'],$pages);
echo "";
echo $page_list;
echo "
";

?>  